In my previous blog post I mentioned that mining Bitcoins alone probably wasn't worth it, and suggested investing Bitcoins in a contract mining service such as Pyramining as an alternative. Pyramining is an organisation that has a very efficient Bitcoin mining infrastructure, that you can pay Bitcoins to use. Basically, you invest money and effectively borrow some of their mining hardware. Over time, that hardware earns Bitcoins via mining, and you recover your initial investment, plus a bonus.